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Subject[patch 7/9] kdump: Trigger kdump via panic notifier chain on s390
From: Michael Holzheu <holzheu@linux.vnet.ibm.com>

On s390 we have the possibility to configure actions that are executed in
case of a kernel panic. E.g. it is possible to automatically trigger an s390
stand-alone dump. The actions are called via a panic notifier. We also want
to trigger kdump via the notifier call chain. Therefore this patch disables
for s390 the direct kdump invocation in the panic() function.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
---
kernel/panic.c | 3 +++
1 file changed, 3 insertions(+)
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -84,9 +84,12 @@ NORET_TYPE void panic(const char * fmt,
/*
* If we have crashed and we have a crash kernel loaded let it handle
* everything else.
+ * For s390 kdump is triggered via the panic notifier call chain.
* Do we want to call this before we try to display a message?
*/
+#if !defined(CONFIG_S390)
crash_kexec(NULL);
+#endif

kmsg_dump(KMSG_DUMP_PANIC);



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